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    <script>
        const promise = new Promise((resolve, reject) => {
            console.log(1);
            console.log(2);
        }).then(() => {
            console.log(3);
        })
        console.log(4);

        // 和题目二相似，只不过在promise中并没有resolve或者reject
        // 因此promise.then并不会执行，它只有在被改变了状态之后才会执行。
        // 124
    </script>
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